River bank erosion at the middle Amur

Abstract

Lateral deformations of middle Amur are under consideration. The river valley in the middle flow subsequently crosses Amur-Zeya plain, offsets of Lesser Hingan ridge and Middle Amur lowland. The river banks consisted of unconsolidated sediments within the plain and lowland are being washed at a rate up to 5 mm/y. As a result the smoothed changes of river channel occurs within the range of wide flood-plain. When crossing Lesse Hingan the channel becomes embedded and the flood-plain disappears. The characteristic period of the channel's changes is of geologic time-scale. The dependence of the river bank erosion from the vertical deformations of channel, its slope, Amur's water run-off, sediment load, coarseness of suspended sediments and human activity is revealed.